Why is Facebook Ad and Google Ad Allow Fraud & Scam Content?

So many times when I see an interesting Ad on Facebook or Google, I clicked on it and immediately it open up a phishing or scam site.

Is time really so bad Google and Facebook have to resort to such measure???

This is a smart consumer era and shouldn't every industry should start functioning professionally? Words spread very fast and soon no one want to be associated with your company and hence your overall income dropped because of a short-sighted decision.